Hey, I first thought great! You've embedded one of the Java libraries such as xuggle. however, I was surprised to see this is just replaying the images extracted from the video file. Good idea, but not really a video player.. ;-)

Oh, I agree. There is always room for improvement; especially with code refactoring and improvement. However, credit where credit is due. I really like this implementation.

Thanks Spilli, thats what I plan today. Add code to move balls back to when they actually hit and prioritize the collision order. This should then ensure the balls never cling to each other. I'm also just putting a movable light source in and considering how to put ball reflections into a ball!

Pretty good once you figure out how to squint! Overall, it becomes too repetitive with the dragging. It's not a great way to interact. I did manage to complete. Liked the way the information was shown at the end. The clue helped.. Not sure what else you can do, but well done!

you can also drag the balls.. The left/right to turn off/on lighting isn't operating right now. Will try to update tomorrow night or Monday.